121162661265 has 16 divisors (see below), whose sum is σ = 193865918400. Its totient is φ = 64618199232.

The previous prime is 121162661237. The next prime is 121162661303. The reversal of 121162661265 is 562166261121.

It is not a de Polignac number, because 121162661265 - 2²⁶ = 121095552401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526551 + ... + 720819.

It is an arithmetic number, because the mean of its divisors is an integer number (12116619900).

Almost surely, 2^121162661265 is an apocalyptic number.

121162661265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121162661265 is a deficient number, since it is larger than the sum of its proper divisors (72703257135).

121162661265 is a wasteful number, since it uses less digits than its factorization.

121162661265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235856.

The product of its digits is 51840, while the sum is 39.

The spelling of 121162661265 in words is "one hundred twenty-one billion, one hundred sixty-two million, six hundred sixty-one thousand, two hundred sixty-five".